SIGNIFICANT ACCOUNTING POLICIES (Details - Revenue) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	$ 333,918	$ 190,566	$ 649,237	$ 472,130
Total service revenue	333,918	190,566	649,237	472,130
Commercial insurance
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	187,354	96,349	369,566	251,711
Medicare
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	71,407	35,082	134,877	92,587
Medicaid
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	9,039	4,300	17,486	10,980
Workers' compensation/personal injury
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	10,556	7,359	20,966	17,916
Other patient revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	5,189	3,549	9,961	9,218
Management fee revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	5,533	3,332	10,752	5,899
Teleradiology and Software revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	2,621	2,200	5,047	5,970
Other
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	3,795	3,527	6,416	9,750
Service fee revenue
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	295,494	155,698	575,071	404,031
Revenue under capitation arrangements
Revenue from External Customer [Line Items]
Service fee revenue, net of contractual allowances and discounts	$ 38,424	$ 34,868	$ 74,166	$ 68,099